Well, you can look at it that way but Djokovic won so many 'things' from 2007 before 2011. Do I need to remind you?
Djokovic was not 'underdeveloped' even in 2016. He ended up as what, I can't remember, I think #16 at the end of 20016 if I remember correctly. He was only 18 or 19yo.
He was undeveloped comparing to his prime. Pre-prime Djokovic won slam and masters titles because he was good enough for these achievements. That's still nothing comparing to 11 slams, 5 WTFs and majority of 30 masters titles which he won in his prime, from 2011. 2011+ Djokovic is clearly different and much better player than pre-2011 Djokovic.